diff --git a/src/Contracts/Types/Str.php b/src/Contracts/Types/Str.php
index 04e75ba..344f070 100644
--- a/src/Contracts/Types/Str.php
+++ b/src/Contracts/Types/Str.php
@@ -77,7 +77,7 @@ class Str extends SolidityType implements IType
     public function outputFormat($value, $name)
     {
         $strLen = mb_substr($value, 0, 64);
-        $strValue = mb_substr($value, 64, 64);
+        $strValue = mb_substr($value, 64);
         $match = [];
 
         if (preg_match('/^[0]+([a-f0-9]+)$/', $strLen, $match) === 1) {
@@ -87,4 +87,4 @@ class Str extends SolidityType implements IType
 
         return Utils::hexToBin($strValue);
     }
-}
\ No newline at end of file
+}